frontend: Add frontend receiver for Error applet

src/core/frontend/applets/error.h

@@ -0,0 +1,37 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <chrono>
+#include <functional>
+
+#include "core/hle/result.h"
+
+namespace Core::Frontend {
+
+class ErrorApplet {
+public:
+    virtual ~ErrorApplet();
+
+    virtual void ShowError(ResultCode error, std::function<void()> finished) const = 0;
+
+    virtual void ShowErrorWithTimestamp(ResultCode error, std::chrono::seconds time,
+                                        std::function<void()> finished) const = 0;
+
+    virtual void ShowCustomErrorText(ResultCode error, std::string dialog_text,
+                                     std::string fullscreen_text,
+                                     std::function<void()> finished) const = 0;
+};
+
+class DefaultErrorApplet final : public ErrorApplet {
+public:
+    void ShowError(ResultCode error, std::function<void()> finished) const override;
+    void ShowErrorWithTimestamp(ResultCode error, std::chrono::seconds time,
+                                std::function<void()> finished) const override;
+    void ShowCustomErrorText(ResultCode error, std::string main_text, std::string detail_text,
+                             std::function<void()> finished) const override;
+};
+
+} // namespace Core::Frontend